According to some scientists, acid rain is rapidly destroying forests in many parts of the world. There is now growing public awareness of this issue, and governments are under pressure to take action. The problem, say environmentalists, boils down to the need for strict controls on the emissions from power stations. Opponents of these measures say that the ultra-high cost of making power stations safe would raise the price of electricity to an unacceptable level. But many people feel that there is on alternative and that it is time grasp the nettle. It now seems likely that governments will be obliged to do more to combat this problem in the not too distant future.